big moldy area on iMac LCD
does anybody has seen such a screen on iMac?
below the screen glass, on the black film of the LCD, there are bubbles that looks like this, once monitor light up
Ick. That’s just gross. I have seen that happen to an iMac that sat in a damp basement for a year or so. I wouldn’t bother cleaning that because mold is hazardous.
Here’s a link to a replacement screen
Here’s a link to a guide on how to replace the screen
If it truly is mold inside your system, your system will require a deep cleaning because as Dan said, any loose spores can re-infect the system and the home. It’s up to you, but I advise that you either deep clean your system or throw it away if it truly is mold.
On the other hand, if it isn’t mold and rather heat damage as Dan noted replacing the screen will help you out in your case.
In all reality, it should not matter what it is but that you need to get rid of it. Check for a fungal LCD on here Fungus on LCD screen Whatever damage it is you can always try and disassemble the actual panel. Most of the damage is most likely on the diffuser sheets. The panel on this iMac can still be disassembled to get to it. You could try and clean (use bleach for the system) those sheets or replace them. Just be careful when you do take it apart that you do not mix up or flip the sheets. The proper order and direction needs to be retained. If nothing else, you can also replace the display relatively inexpensive and fairly easy.